{
  "abstract": "We construct conformal boundary conditions of free Dirac fermions that preserve chiral, anomaly-free symmetries, and determine the associated fermion-boundary scattering, using the TQFT/CFT framework. We apply the construction to several previously unresolved examples: higher-charge monopoles in non-chiral QED, a family of $SU(N)\\times SU(N+2)$-symmetric models, the chiral QED with charges $\\{1^5,3,(-2)^4\\}$, and the charge-three monopole of the Standard Model. In these examples, out-going states are created by defect operators at the end of non-invertible topological lines; when such a line is non-simple, the out-going state splits into superselection sectors, and we give a formula for the branching ratios in terms of TQFT data. We also propose a general construction that adds and then gaps neutral spectators, under a technical assumption, which is potentially applicable to the 1-5-7-8-9 model.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.31737",
  "author_total": 4,
  "authors": [
    {
      "name": "Kantaro Ohmori"
    },
    {
      "name": "Masataka Watanabe"
    },
    {
      "name": "Pengcheng Wei"
    },
    {
      "name": "Yunqin Zheng"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/61yg49q5jgmxd.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.31737",
  "fulltext_url": null,
  "id": "61yg49q5jgmxd",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.31737",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.str-el"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Black Holes and Theoretical Physics"
    ]
  ],
  "openalex": "W7223656341",
  "pdf_url": "https://arxiv.org/pdf/2610.31737",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/61yg49q5jgmxd.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2610.31737",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.31737"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.str-el",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Intertwining Defects and Fermion-Boundary Scattering from TQFT",
  "title_text": "Intertwining Defects and Fermion-Boundary Scattering from TQFT",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/61yg49q5jgmxd",
  "venue": "arXiv",
  "versions": []
}